Silence is not merely negative -- a pause between words, a temporary cessation of speech -- but properly understood, it is highly positive: an attitude of attentive alertness, of vigilance, and above all, of listening.
Responsible people are beginning to realize that the earth is an awesome mystery, ultimately as fragile as we are ourselves. ...That being so, there is need to be sensitive to the earth, for the earth identifies with our own suffering, exploitation of the earth is exploitation of the human, elimination of the aesthetic splendors of the earth is the diminishment of all existence.